Feature:1. RELIABLE MATERIAL: This carpenter square is made of aluminum alloy die casting, which is oxidation resistant, not easy to rust. Each ruler is thick, with high hardness and not easy to break2. CLEAR GRADUATIONS: Include 7in imperial triangular ruler, with black matte finish to prevent dazzle. Employing etching for the scale, and has a common rafter conversion table on the ruler for clear conversion, providing you with a high level of accuracy and easy readability3. DELICATE DESIGN: Metal square is convenient to hung and store when not in use, and the ruler surface is smooth and flat, so that won't hurt your hand when you use4. EASY TO USE: The tangent line is flat so that you can easily make the ruler flush with the wood, creating a straight or angled line that is proportionate to the wood edge5. MULTI PURPOSE: The metal rafter square can be used as a protractor, saw guide, woodworking compass, triangular square and frame square. Suitable for woodworking projectsSpecification:Item Type: Carpenter SquareMaterial: Aluminum alloyMeasuring Length(imperial): Approx. 17.8cm / 7in.Package List:1 x Carpenter SquareNote:Please allow tiny size error due to manual measurement. Thanks for your understanding.